merge:REPORT-53229 补上空格

designer-base/src/main/java/com/fr/design/mainframe/DesignerFrame.java

@@ -608,6 +608,7 @@ public class DesignerFrame extends JFrame implements JTemplateActionListener, Ta
         JTemplate<?, ?> editingTemplate = HistoryTemplateListCache.getInstance().getCurrentEditingTemplate();
         StringBuilder defaultTitleSB = new StringBuilder();
         defaultTitleSB.append(ProductConstants.APP_NAME);
+        defaultTitleSB.append(" ");
         defaultTitleSB.append(GeneralUtils.getVersion());
         defaultTitleSB.append(" ");
         defaultTitleSB.append(ProductConstants.BRANCH);